3. Conduct a randomized, controlled pilot study to determine the potential feasibility, acceptability, and efficacy of ERP compared with, Parent Education (PE), a 12-week comparison condition in which mothers will attend 12 1-hour parent education sessions conducted by a paraprofessional. Sixty mothers enrolled in outpatient drug treatment who have at least one child between the ages of 18 and 36 months in their custody will participate. Because the intervention will directly target change in maternal psychological representations of parenting, primary outcomes will be (a) maternal 'reflective functioning' (capacity to make inferences about emotional cues, (b) capacity for balanced psychological representations of the child, and (c) knowledge of the child's developmental capacities. The intervention will indirectly target maternal and child behavior and maternal psychosocial adjustment. Secondary outcomes will be: maternal sensitivity to her child's emotional cues, the child's use of the mother as a secure base, and maternal psychiatric distress, daily functioning and substance abuse.